Contract Between A Specter And A Servant summary:

"Do you want to die, or live as my servant?" A beautiful specter asked me to live with him.Masamichi was depressed that day. He failed the university entrance exam for the second time, and lost his part-time job at izakaya pub. But then came the most unlucky part--getting hit by a car. "My life is ending here," he thought. However....a mysterious, handsome man appeared before him. "Be my servant. Work for me, and be my prey. If you accept, I'll heal your body. I'll give you a place to live and food to eat." When Masamichi took his hand, a whole new life started!